JPH0689466A - Master disk for production of disk and production of disk by using this master disk - Google Patents

Abstract

PURPOSE:To continuously and efficiently transfer rugged patterns to a resin layer without impairing the flatness of a film and to improve the productivity of the disk having good flatness. CONSTITUTION:A roller type stamper 1 is constituted by forming a body part 1d into a rectangular parallelepiped and providing respective flanks 1a... with the rugged patterns 2... to be transferred to the resin layer of the film. The disk is produced by rotating the roller type stamper 1 around a revolving shaft 3 while bringing the stamper into pressurized contact with the resin layer to continuously transfer the rugged patterns 2... to the resin layer and curing the resin layer in the state of bringing the rugged patterns 2... and the resin layer into pressurized contact with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk manufacturing master used for manufacturing a flexible disk or the like, and a disk manufacturing method using the disk manufacturing master.

[0002]

2. Description of the Related Art Conventionally, for example, in the case of manufacturing a flexible disk, a disk-manufacturing master (hereinafter referred to as a stamper) on which an information signal is formed by unevenness is referred to as a flexible plastic film (hereinafter referred to as a film). A method of transferring the uneven pattern of the information signal to these resin layers by pressing on the ultraviolet curable resin or thermosetting resin applied to (referred to), and at the same time curing the resin layer with ultraviolet rays or heat to form a disk. Is being done.

As a method for manufacturing a flexible disk using the above stamper, for example, a so-called roller type stamper having a stamper provided on the surface of a cylindrical plate is conveyed while being wrapped with a resin-coated film.
A method of transferring the uneven pattern of the information signal to the resin layer and curing the resin layer (Japanese Patent Publication No. 63-31847).
JP 62-293529 A, JP 3-1478 A
34), a resin-coated film is conveyed while being sandwiched between a roller type stamper and a pressure roller that is in pressure contact with the stamper, thereby transferring a concavo-convex pattern to the resin layer and forming the resin layer. A method of curing (JP-A-2-161637), a resin-coated film is sandwiched between a stamper provided on a flat plate and an impression cylinder pressed against the stamper to form an uneven pattern on the resin layer. There is a method of transferring and curing the resin layer (Japanese Patent Publication No. 62-25092).

[0004]

However, when the flexible disk is manufactured by any of the above methods (1) to (3), there are the following problems.

That is, in the method (1), since the film is wound around the roller stamper to transfer the uneven pattern of the information signal and the resin layer is cured, the flatness of the manufactured disk may be impaired. This method has a problem.In the method of (1), a film is mounted on the pressure contact portion between the roller stamper and the pressure roller, and the pressure is applied to transfer the uneven pattern and to cure the resin layer. There is a problem that wrinkle-like deformation may occur or the disc surface may be scratched. With this method, the flatness of the produced disc is good because the stamper provided on the flat plate is used. However, since the stamper has to be reciprocated every time the concave-convex pattern is transferred, there is a problem that the productivity of the disc is inferior as compared with the above methods. That.

In view of the above problems, the present invention can transfer an information signal to an ultraviolet curable or thermosetting resin layer formed on a disc substrate without impairing the flatness of the disc substrate. An object of the present invention is to provide a disk manufacturing master and a method for efficiently manufacturing a disk using the master for disk manufacturing without damaging the flatness of the disk substrate.

[0007]

In order to solve the above-mentioned problems, a disk manufacturing master according to a first aspect of the present invention has a master main body made of polygonal columns, and information is provided on each side surface of the polygonal columns. The feature is that a signal is formed.

In order to solve the above-mentioned problems, a disk manufacturing method according to a second aspect of the present invention is a disk manufacturing method using a disk manufacturing master, wherein the disk substrate is UV-curable or heat-curable. After forming the resin layer of, the disc manufacturing master with the information signal formed on each side of the polygonal column is pressed against the above resin layer to transfer the information signal to the resin layer, and at the same time, cure or heat the resin layer. It is characterized by hardening.

[0009]

According to the structure of the first aspect, the disc manufacturing master has a master main body made of a polygonal prism, and an information signal is formed on each side surface of the polygonal prism. Therefore, for example, by pressing the disc manufacturing master onto the disc substrate,
Information signals can be transferred to the disc substrate without impairing the flatness of the disc substrate. Further, since the information signal is formed on each side surface, for example, the information signal can be continuously and efficiently transferred onto the disk substrate by rotating the disk manufacturing master while pressing it against the disk substrate.

According to the second aspect of the present invention, the disc is a master for disc production in which an information signal is formed on each side of a polygonal column, and an ultraviolet curable or thermosetting resin layer formed on the disc substrate. It is manufactured by press-contacting with, transferring an information signal to the resin layer, and curing the resin layer with ultraviolet rays or heat. Therefore, for example, by rotating the disc manufacturing master while pressing it against the disc substrate, the information signals formed on each side surface can be continuously and efficiently transferred to the disc substrate without impairing the flatness of the disc substrate. it can. As a result, it becomes possible to improve the productivity of the disk having good flatness.

[0011]

【Example】

[Embodiment 1] One embodiment of the present invention will be described with reference to FIGS.
The explanation is based on the following. In the present embodiment, the case where the master body for disc manufacturing is a rectangular parallelepiped will be described as an example.

As shown in FIG. 1, a roller-type stamper 1 as a disc manufacturing master according to the present embodiment has a rectangular parallelepiped main body (master master body) 1d, and each of the above-mentioned main bodies 1d. The side surfaces 1a ... Have a rectangular shape. .. are provided at predetermined positions on the respective side surfaces 1a ... As an information signal to be transferred to a resin layer described later. In the above-mentioned concavo-convex pattern 2, ..., the portion that should be convex in the resin layer is formed in a concave shape, while the portion that should be concave in the resin layer is formed in a convex shape. Uneven pattern 2 ...
2 are provided on each side surface 1a ...
The roller stamper 1 has a total of eight concavo-convex patterns 2 ...
Is provided.

The concavo-convex pattern 2 is formed by a Ni stamper having a thickness of, for example, 300 μm by a known method such as an electroforming method, and each side surface 1a of the main body 1d is formed by using a double-sided tape or an adhesive. It is provided by attaching and fixing to. Therefore, the roller-type stamper 1 can be adapted to manufacture various discs having different concavo-convex patterns by replacing the Ni stamper. The size of the above-mentioned side faces 1a may be appropriately set according to the size of the disc to be manufactured.
When two concavo-convex patterns 2 are provided on one side surface 1a as described above, for example, if the concavo-convex pattern 2 has a size of 130 mmφ, the length A may be set to 400 mm and the width B may be set to 200 mm. Instead of separately manufacturing the stamper made of Ni, it is also possible to directly manufacture the concavo-convex pattern 2 on each side surface 1a of the main body 1d by an electroforming method or the like.

The roller type stamper 1 has a body portion 1
A rotating shaft 3 passing through the centers of the upper surface 1b and the lower surface 1c of d is provided.
It is rotatably held by a bearing (not shown) (FIG. 2). Further, each side of the main body 1d of the roller-type stamper 1 is chamfered so that the surface of the flexible film or the resin layer, which will be described later, is not scratched when the uneven patterns 2 ... Are transferred.

Next, as shown in FIG. 2, the disc manufacturing apparatus 10 includes a delivery roller 6 for delivering a flexible film (hereinafter, simply referred to as a film) 5 as a disc substrate at a constant speed and a winding for winding the film 5. Taking roller 7
And a tension measuring section 11, a resin coating section 12, tension adjusting rollers 13 and 13 movably provided in the B ₁ -B ₂ direction, a transfer section 14, and a rear portion between the rollers 6 and 7. A curing unit 15 and an interleaf paper supply unit 16 are provided. As the film 5, for example, plastic such as polyethylene, polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polypropylene, polyamide, polyimide, metal such as aluminum, synthetic paper or the like is formed into a film having flexibility. Possible materials are used. The thickness of the film 5 is 10 μm to 1
The thickness is preferably 50 μm, but is not particularly limited.
Further, the width of the film 5 may be appropriately set according to the size of the uneven pattern 2 provided on the roller stamper 1.

The tension measuring section 11 includes a measuring roller 11a,
Auxiliary roller 1 provided before and after this measuring roller 11a
1b and 11b, the tension of the film 5 is measured by detecting the urging force of the film 5 on the measuring roller 11a in the A direction, and is input to a controller (not shown). When the input tension is smaller than a predetermined value, the control device controls the tension adjusting roller 13 ...
13 is moved in the B ₁ direction to increase the tension of the film 5, while when the tension is larger than a predetermined value, the tension adjusting rollers 13 and 13 are moved in the B ₂ direction to reduce the tension of the film 5. Thus, the feedback control for keeping the tension of the film 5 always constant is performed so that the transfer operation in the transfer unit 14 is performed under the optimum condition.
Further, the control device is configured such that the feeding roller 6 and the winding roller 7 are provided.
In addition to the rotation speed, the operation of each part such as the resin coating part 12 and the transfer part 14 is controlled.

The resin coating section 12 includes a coating roller 12a for coating the film 5 with an ultraviolet curable resin, a pressure roller 12b for pressing the coating roller 12a, and a coating roller 1 for coating.
Supply unit 12c for supplying ultraviolet curable resin to 2a
When the film 5 passes through the pressure contact portion between the coating roller 12a and the pressure roller 12b, the film 5
An ultraviolet curable resin is evenly applied on the surface to form a resin layer (not shown) having a constant film thickness. The method of applying the ultraviolet curable resin to the surface of the film 5 by the application roller 12a may be offset gravure coating or reverse coating, for example. Examples of the ultraviolet curable resin include urethane acrylate resin, epoxy acrylate resin, and mixed resins of these resins (for example, manufactured by Mitsubishi Rayon Co., Ltd.
MP-107, DICURE CLEAR STM-401 manufactured by Dainippon Ink and Chemicals, Inc.) is used. The resin layer may be formed to a thickness of, for example, about 50 μm so that the thickness after curing is about 2 μm to 40 μm, but the thickness is not particularly limited.

The transfer portion 14 is a roller stamper 1 in which a rotating shaft 3 is rotatably held by a bearing (not shown).
And the ultraviolet irradiation lamp 17 ... and the irradiation area limited cover 1
8 is provided, and the roller-type stamper 1 is rotated in the direction C while being pressed against the film 5, so that the concavo-convex pattern 2 provided on the side surfaces 1a of the roller-type stamper 1 is formed.
Is transferred to the resin layer formed on the surface of the film 5, and ultraviolet rays are emitted from the ultraviolet irradiation lamp 17 while the concave / convex pattern 2 and the resin layer are in pressure contact with each other to cure the resin layer. ing. The above ultraviolet irradiation lamps 17 are adapted to irradiate an amount of ultraviolet rays required for curing the resin layer while the film 5 passes through the transfer portion 14. Further, the irradiation area limiting cover 18 is provided so as to cover the ultraviolet irradiation lamps 17 and so that the ultraviolet rays emitted from the ultraviolet irradiation lamps 17 are pressed against the roller stamper 1 to form a resin layer. It is designed to be irradiated only on. When an anaerobic resin is used as the ultraviolet curable resin, the irradiation area limiting cover 18 may not be provided.

The post-curing section 15 includes a UV irradiation lamp 19 ...
Film 5 that has a sheet and is sent from the transfer unit 14.
The resin layer is post-cured so that it is completely cured. The interleaf paper supply unit 16 is an interleaf paper 8
And a superimposing roller 16c for superposing the interleaving paper 8 on the film 5, and a interleaving paper 16a.
And a tension adjusting roller 16b for adjusting the tension. The interleaving paper 8 is wound around the winding roller 7 together with the film 5 so as to protect the resin layer on which the concavo-convex pattern is transferred from being scratched.

Next, a method of manufacturing a disk by the disk manufacturing apparatus 10 having the above structure will be described. First, the film 5 delivered from the delivery roller 6 is loaded into the tension measuring unit 11
After the tension is measured by passing through, the resin coating section 12 coats the surface of the film 5 with an ultraviolet curable resin to a certain thickness to form a resin layer. Next, tension adjusting rollers 13
Is moved in the B ₁ -B ₂ direction, the tension of the film 5 is adjusted to a predetermined value, and the film 5 is sent to the transfer unit 14. In the transfer portion 14, the uneven pattern 2 provided on the roller stamper 1 is transferred to the resin layer on the surface of the film 5, and ultraviolet rays are emitted from the ultraviolet irradiation lamps 17 to cure the resin layer. The pressure contact force between the roller type stamper 1 and the resin layer changes with the rotation of the roller type stamper 1. However, by adjusting the tension of the film 5 by the movement of the tension adjusting rollers 13, 13, a constant pressure contact force is obtained. It is kept to help.

Subsequently, the film 5 is passed through the post-curing section 15 to completely cure the resin layer, and the film 5 is taken up by the take-up roller 7 together with the interleaving paper supplied from the interleaving paper supply section 16. After that, the film 5 wound around the winding roller 7 is die-cut into a disc shape by a die (not shown) or the like to form a disc.

Here, the transfer operation of the concavo-convex pattern 2 ... To the resin layer on the surface of the film 5 will be described with reference to FIG. First, as shown in FIG. 3A, the roller stamper 1 is rotated in the C direction. Thereby, the uneven pattern 2
The side surface 1a ₀ provided with 2 approaches the resin layer (not shown) on the surface of the film 5. At this stage, the ultraviolet rays are shielded by the irradiation area limiting cover 18, and the resin layer is not cured. Next, as shown in FIG. 3B, the roller stamper 1 is further rotated in the C direction to move the side surface 1a.
₀ is pressed against the resin layer, and the concavo-convex pattern 2 is transferred to the resin layer. At this stage, the resin layer is irradiated with ultraviolet rays from the ultraviolet ray irradiation lamps 17 (FIG. 2), and the resin layer starts to cure.

Then, as shown in FIG. 3 (c), while the roller stamper 1 is rotated about half a turn in the C direction, the side surface 1a ₀
The resin layer is cured while maintaining the pressure contact state between the resin layer and the resin layer, and the transfer of the concavo-convex pattern 2 to the resin layer is completed.
After that, as shown in FIG. 3D, the roller stamper 1
Is further rotated in the C direction to separate the side surface 1a ₀ from the resin layer. At this stage, the transfer of the concavo-convex patterns 2 and 2 has already been completed, and the resin layer is not irradiated with ultraviolet rays from the ultraviolet ray irradiation lamps 17 ...

Subsequently, the roller stamper 1 is rotated in the C direction, and the roller stamper 1 is rotated in the same manner as the side surface 1a _0.
By sequentially pressing the other three side surfaces 1a ... Of the three side surfaces against the resin layer, the concavo-convex pattern 2 can be continuously transferred to the resin layer.

With the above structure, the main body 1d of the roller type stamper 1 is formed in a rectangular parallelepiped, so that the film 5 is formed.
The uneven patterns 2 ... Can be efficiently transferred to the resin layer without impairing the planarity of the resin layer. Further, according to the above method, the disk manufacturing apparatus 10 rotates the roller stamper 1 while pressing the roller type stamper 1 against the resin layer on the surface of the film 5 to transfer the concavo-convex pattern 2 provided on each side surface 1a to the resin layer. Since the resin layer is ultraviolet-cured while the uneven pattern 2 is pressed against the resin layer, the disk can be continuously and efficiently manufactured without impairing the flatness of the film 5, and the flatness is excellent. It is possible to improve the productivity of the disc.

In the above embodiment, the roller stamper 1 has a rectangular parallelepiped shape as an example, but the shape of the roller stamper 1 is not limited to a rectangular parallelepiped.
For example, it may be a triangular prism, or may be a polygonal prism such as a pentagonal prism or a hexagonal prism. Even if the shape of the roller stamper 1 is a polygonal prism other than a rectangular parallelepiped, the same effect as in the case of a rectangular parallelepiped can be obtained. In addition, the size and size of the roller stamper 1
Of course, the number of the uneven patterns 2 provided on the one side surface 1a is
The size and the number are not limited to those shown in the above embodiment, and may be appropriately set according to the size of the disc to be manufactured.

Further, in the above-mentioned embodiment, the resin coating section 12 is constructed such that the surface of the film 5 is coated with the ultraviolet curable resin to a constant thickness to form the resin layer. Instead of applying the mold resin, an ultraviolet curable resin may be formed into a sheet having a constant thickness, and this sheet may be attached to the surface of the film 5 to form a resin layer.

[Second Embodiment] The following will describe another embodiment of the present invention with reference to FIG. For convenience of explanation, FIG. 3 used in the description of the first embodiment will be used again, and members having the same functions as those shown in the drawings of the first embodiment will be designated by the same reference numerals and the description thereof will be omitted. Is omitted.

As shown in FIG. 4, the disk manufacturing apparatus 20 of the present embodiment includes a transfer section 14 shown in FIG. 2 of the first embodiment.
Further, instead of the post-curing section 15, a transfer section 24 and a cooling section 23 are provided. Further, the resin application section 12 is adapted to uniformly apply a thermosetting resin to the surface of the film 5 to form a resin layer (not shown) having a constant film thickness. Examples of the thermosetting resin, for example, polyester resin,
Epoxy resin, acrylic resin, urethane resin, melamine resin, and mixed resin of these resins are used.
The thickness of the resin layer after curing is approximately 2 μm to 40 μm.
The thickness may be formed to a thickness of, for example, about 50 μm, but is not particularly limited.

The transfer section 24 has a roller stamper 1 and a heater (not shown) built in the roller stamper 1. The above-mentioned heater is used for the roller stamper 1 at 100 ° C. to 150 ° C., for example. It is designed to heat up. Then, the transfer portion 24 rotates the roller stamper 1 in the direction C about the rotation shaft 3 while pressing the roller stamper 1 against the film 5, thereby allowing the side surface 1 of the roller stamper 1 to rotate.
a is transferred to the resin layer formed on the surface of the film 5, and the concavo-convex pattern 2 is formed on the surface of the film 5.
The resin layer is heated and cured with the resin layer and the resin layer being pressed against each other. The heating amount of the heater is controlled by a control device (not shown), and the film 5
Is supplied with the amount of heat necessary for the resin layer to cure while passing through the transfer portion 24.

The cooling unit 23 has a fan 23a, and cools the film 5 sent from the transfer unit 24 to room temperature. The operations of the transfer unit 24 and the cooling unit 23 are controlled by a control device (not shown). The other structure is the same as that of the disk manufacturing apparatus 10 of the first embodiment.

Next, a method of manufacturing a disk by the disk manufacturing apparatus 20 having the above structure will be described. First, similarly to the disk manufacturing apparatus 10 described above, a thermosetting resin is applied to the surface of the film 5 to a constant thickness to form a resin layer. Then, adjust the tension of the film 5 to a predetermined value,
The film 5 is sent to the transfer section 24. In the transfer section 24, the concave-convex pattern 2 provided on the roller stamper 1 is transferred to the resin layer on the surface of the film 5, and the resin layer is cured by heating with a built-in heater. Then, film 5
Is passed through the cooling unit 23 to be cooled to room temperature, and is taken up by the take-up roller 7 together with the interleaving paper supplied from the interleaving paper supply unit 16. After that, the film 5 wound around the winding roller 7 is die-cut into a disc shape by a die (not shown) or the like to form a disc.

Here, the transfer operation of the concavo-convex pattern 2 ... to the resin layer on the surface of the film 5 will be described with reference to FIG. First, as shown in FIG. 3A, the roller stamper 1 is rotated in the C direction. Thereby, the uneven pattern 2
The side surface 1a ₀ on which 2 is formed approaches the resin layer (not shown) on the surface of the film 5. At this stage, the resin layer is not cured because it is not in contact with the roller stamper 1. Next, as shown in FIG. 3B, the roller stamper 1 is further rotated in the C direction to bring the side surface 1a ₀ into pressure contact with the resin layer, and the concave / convex pattern 2.2 is transferred to the resin layer.
At this stage, heat is applied to the resin layer from the roller stamper 1, and the resin layer begins to cure.

Then, as shown in FIG. 3 (c), while the roller stamper 1 is rotated about half a turn in the C direction, the side surface 1a ₀
The resin layer is cured while maintaining the pressure contact state between the resin layer and the resin layer, and the transfer of the concavo-convex pattern 2 to the resin layer is completed.
After that, as shown in FIG. 3D, the roller stamper 1
Is further rotated in the C direction to separate the side surface 1a ₀ from the resin layer. Subsequently, the roller stamper 1 is rotated in the C direction, and the other three side surfaces 1a of the roller stamper 1 are sequentially pressed against the resin layer in the same manner as the side surface 1a ₀ , so that the uneven pattern 2 is formed on the resin layer. It can be continuously transferred.

With the above structure, the main body 1d of the roller type stamper 1 is formed in a rectangular parallelepiped, so that the film 5
The uneven patterns 2 ... Can be efficiently transferred to the resin layer without impairing the planarity of the resin layer. Further, according to the above method, the disk manufacturing apparatus 20 rotates the roller stamper 1 while pressing it against the resin layer on the surface of the film 5 to transfer the concavo-convex pattern 2 provided on each side surface 1a to the resin layer. Since the resin layer is thermoset in a state where the uneven pattern 2 ... and the resin layer are in pressure contact with each other, the disk can be continuously and efficiently manufactured without impairing the flatness of the film 5, and the flatness is excellent. It is possible to improve the productivity of the disc.

In the above-mentioned embodiment, the resin coating section 12 applies a thermosetting resin to the surface of the film 5 to a certain thickness to form a resin layer. Instead of applying the mold resin, a thermosetting resin may be formed into a sheet having a certain thickness, and this sheet may be attached to the surface of the film 5 to form a resin layer. Further, in the above embodiment, the heater for curing the resin layer is provided inside the roller stamper 1, but instead of incorporating the heater in the roller stamper 1, a heating device is provided outside the roller stamper 1. May be provided, and the resin layer may be cured by this heating device.

[0037]

The master disk for disk production according to claim 1
As described above, the master disc main body portion having a polygonal prism is provided, and the information signal is formed on each side surface of the polygonal prism.

Therefore, the information signal can be transferred to the disk substrate without impairing the flatness of the disk substrate, for example, by pressing the disk manufacturing master disc against the disk substrate. Further, since the information signal is formed on each side surface, it is possible to transfer the information signal continuously and efficiently onto the disc substrate by rotating the disc manufacturing master disc while pressing it against the disc substrate, for example. Produce an effect.

In the method of manufacturing a disk according to a second aspect of the present invention, the information signal is formed on each side surface of the polygonal column after the ultraviolet-curing or thermosetting resin layer is formed on the disk substrate as described above. A master for disk production is pressed against the resin layer to transfer an information signal to the resin layer, and at the same time, the resin layer is cured by ultraviolet rays or heat.

Therefore, for example, by rotating the disc manufacturing master while pressing it against the disc substrate, the information signals formed on the respective side surfaces can be continuously and efficiently produced on the disc substrate without impairing the flatness of the disc substrate. Can be transcribed. That is, there is an effect that it is possible to improve the productivity of a disc having good flatness.

[Brief description of drawings]

FIG. 1 is a perspective view of a roller stamper included in a disc manufacturing apparatus.

FIG. 2 is a schematic configuration diagram showing a disk manufacturing apparatus according to an embodiment of the present invention.

FIG. 3 is an explanatory view showing a pressed state of a roller stamper and a film.

FIG. 4 is a schematic configuration diagram showing a disk manufacturing apparatus in another embodiment of the present invention.

[Explanation of symbols]

 1 Roller-type Stamper (master for disk manufacturing) 1a Side surface 1d Main body (master main body) 2 Concavo-convex pattern (information signal) 5 Film (disk substrate) 6 Sending roller 7 Winding roller 10 Disk manufacturing device 12 Resin coating part 14 Transfer 17 UV irradiation lamp 20 Disk manufacturing device 24 Transfer unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Ota 22-22 Nagaike-cho, Abeno-ku, Osaka, Osaka Prefecture

Claims (2)

[Claims] 1. A master disc for manufacturing a disk, comprising a master disc main body made of a polygonal prism, and an information signal is formed on each side surface of the polygonal prism. 2. A method of manufacturing a disk using a disk manufacturing master, wherein an ultraviolet-curable or thermosetting resin layer is formed on a disk substrate, and then an information signal is formed on each side surface of the polygonal column. A method for manufacturing a disk, comprising: pressing a disk-manufacturing master onto the resin layer to transfer an information signal to the resin layer, and at the same time, curing the resin layer with ultraviolet rays or heat.